Microstructure and magnetic properties of Ni50Mn37Sn13 Heusler alloy ribbons

被引:93
|
作者
Santos, J. D. [1 ]
Sanchez, T. [1 ]
Alvarez, P. [1 ]
Sanchez, M. L. [1 ]
Llamazares, J. L. Sanchez [1 ]
Hernando, B. [1 ]
Escoda, Ll. [2 ]
Sunol, J. J. [2 ]
Varga, R. [3 ]
机构
[1] Univ Oviedo, Dept Fis, Fac Ciencias, E-33007 Oviedo, Spain
[2] Univ Girona, Girona 17003, Spain
[3] UPJS, Inst Phys, Fac Sci, Kosice, Slovakia
关键词
All Open Access; Green;
D O I
10.1063/1.2832330
中图分类号
O59 [应用物理学];
学科分类号
摘要
The Heusler alloy Ni50Mn37Sn13 was successfully produced as ribbon flakes of thickness around 7-10 mu m melt spinning. Fracture cross section micrographs in the ribbon show the formation of a microcrystalline columnarlike microstructure, with their longer axes perpendicular to the ribbon plane. Phase transition temperatures of the martensite-austenite transformation were found to be M-S=218 K, M-f=207 K, A(S)=224 K, and A(f)=232 K; the thermal hysteresis of the transformation is 15 K. Ferromagnetic L2(1) bcc austenite phase shows a Curie point of 313 K, with cell parameter a=0.5971(5) nm at 298 K, transforming into a modulated 7M orthorhombic martensite with a=0.6121(7) nm, b=0.6058(8) nm, and c=0.5660(2) nm, at 150 K. (C) 2008 American Institute of Physics.
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页数:3
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